SKU: 22371187071

Explore Scientific BT-120 SF Large Binoculars with 62 Degree LER Eyepieces

Sale price$1057.49 Regular price$1174.99
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Description

Explore Scientific BT-120 SF Large Binoculars with 62 Degree LER EyepiecesSee Distant Worlds Clearly Want to see the universe up close? Get the BT 120 SF Binoculars that ensure bright, sharp images without distortion. Features Powerful Large Binoculars: 120 mm objective diameter and 660 mm focal length for superior light gathering and image clarity. Dual Purpose Viewing: Perfect for observing celestial objects at night and distant terrestrial targets during the day. Durability and Weather Resistance: IPX6 waterproof and

See Distant Worlds Clearly

 

Want to see the universe up close? Get the BT-120 SF Binoculars that ensure bright, sharp images without distortion.

 

Features

  • Powerful Large Binoculars: 120 mm objective diameter and 660 mm focal length for superior light gathering and image clarity.
  • Dual-Purpose Viewing: Perfect for observing celestial objects at night and distant terrestrial targets during the day.
  • Durability and Weather Resistance: IPX6 waterproof and nitrogen-filled design prevent fogging and withstand harsh weather conditions.
  • Comfortable Viewing Angle: 45-degree angle ensures a fatigue-free experience, even during extended observations.
  • High-Quality Eyepieces: Includes two premium waterproof 62-degree 20mm LER eyepieces for a 33x magnification with a wide 1.8-degree field of view.
  • Interchangeable Eyepieces: Compatible with all 1.25 inch / 31.7mm diameter eyepieces, allowing customization of magnification and field of view.
  • Enhanced Image Quality: Professional Enhanced Multilayer Deposition (EMD) lens coatings and achromatic refractor Porro optics provide bright, sharp, and color-accurate images.
  • Sturdy Construction: Lightweight magnesium housing with integrated carrying handle for easy transport and secure tripod assembly.
  • Extendable Dew Caps: Minimize condensation on lenses and protect against stray light, ensuring clear images in various conditions.
  • Versatile Tripod Compatibility: Fits standard 1/4 inch and 3/8 inch photo threads for stable mounting, with an optional U-Mount for enhanced stability.

The Explore Scientific BT-120 SF Large Binoculars are for you if…

  • You are an Astronomy Enthusiast: Seeking unparalleled clarity and detail in your stargazing sessions, with the ability to observe the moon, planets, and deep-sky objects.
  • You are a Nature and Wildlife Observer: Looking for bright, brilliant images of distant wildlife and landscapes, even in low light conditions.
  • You are a Maritime or Aviation Enthusiast: Wanting to spot ships, aircraft, and distant objects with precision and reliability.
  • You are an Outdoor Adventurer: Needing robust, weather-resistant equipment that can withstand tough outdoor conditions while providing clear and detailed observations.
  • You Value Versatility and Customization: Appreciating the ability to interchange eyepieces and use various filters for personalized viewing experiences.

Imagine gazing at the night sky with unparalleled clarity, seeing the craters on the moon, the rings of Saturn, and distant galaxies with stunning detail. The Explore Scientific BT-120 SF Large Binoculars offer a 120 mm objective diameter and 660 mm focal length, providing exceptional light-gathering capability for bright, clear images even in low light conditions. With professional Enhanced Multilayer Deposition (EMD) lens coatings and achromatic refractor Porro optics, these binoculars transform your stargazing experience, allowing you to explore the cosmos like never before.

For nature and wildlife enthusiasts, the BT-120 SF delivers brilliant daytime performance. Observe birds, wildlife, and distant landscapes with precision, thanks to the high-quality optics and professional lens coatings. The 33x magnification and wide 1.8-degree field of view ensure that you capture every detail, whether you're watching a bird in flight, a deer in the distance, or even ships and airplanes on the horizon. The large 3.6mm exit pupil ensures bright images, even in twilight.

Durability and weather resistance are essential for any serious outdoor equipment, and the BT-120 SF excels in both. Its IPX6 waterproof and nitrogen-filled design prevents internal fogging and withstands harsh weather conditions, ensuring reliable performance in any environment. The robust magnesium housing, combined with a lightweight design of 18.3 lbs, makes these binoculars easy to handle and transport, even on challenging adventures. The integrated carrying handle facilitates transport and ensures a secure hold during tripod assembly.

Comfort and ease of use are also top priorities with the BT-120 SF. The 45-degree viewing angle allows for relaxed, extended viewing sessions without straining your neck or eyes. The long eye relief eyepieces (15mm) and soft silicone eyecups provide a comfortable viewing experience, even for eyeglass wearers. With the fine helical individual focusing mechanism, you can achieve precise focus effortlessly, ensuring the sharpest images every time. The adjustable interpupillary distance from 54 to 76mm ensures a personalized and comfortable viewing experience for all users.

Customization and versatility set the BT-120 SF apart. The interchangeable eyepieces with a 1.25 inch / 31.7mm plug-in diameter allow you to adjust magnification and field of view to suit your needs. Choose from a wide range of eyepieces, with focal lengths from 8 to 26mm, and use various color and nebula filters for personalized viewing experiences. Compatible with a wide range of Explore Scientific eyepieces, including the 62 and 82 degree series, you can achieve magnifications from 25x to 75x. The precise brass compression ring clamp ensures a stable, tilt-free position for the eyepieces, providing reliable performance during every observation. The extendable dew caps minimize condensation on lenses and protect against stray light, ensuring clear images in various conditions.

Investing in the Explore Scientific BT-120 SF Large Binoculars means unlocking a world of clarity and detail, whether you're an avid stargazer, a passionate wildlife observer, or an adventurous explorer. These binoculars combine advanced optical technology, robust construction, and versatile features to deliver an unparalleled viewing experience. Elevate your observations with the BT-120 SF and see the world in a whole new light.


Elevate Your Observation Experience

To truly maximize the potential of your Explore Scientific BT-120 SF Large Binoculars, pairing them with the Explore Scientific U-mount with tripod for large binoculars is a must. This robust mount ensures that your binoculars remain stable, providing a vibration-free viewing experience even at the highest magnifications. The U-mount’s infinitely variable friction adjustment allows for smooth and precise movements in both azimuth and altitude axes, ensuring you can effortlessly track celestial objects or terrestrial targets.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 22371187071

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4.7 ★★★★★
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Product Reviews
J
Verified Purchase
jc
Louisville, US
★★★★★ 4
The basic set-up is relatively easy which was a big plus for me......
First let me start off by saying that I am not an audiophile. So, this review will not get into the weeds of the more complex settings this receiver is capable of. For example, the Dirac room measuring option. No way was I attempting to mess with that. Especially, after reading that some reviewers who actually have experience with Dirac found it could be confusing/difficult to set up. Besides I come from a previous Onkyo the TX-SR607 which had the AccuEQ Room Calibration similar to this receiver, so I used that instead with no issues. As far as hooking up the speakers it's pretty straight forward. If you have banana plugs, use them, seriously. I originally planned on using banana plugs but in order to save time I decided against that. But I wish I had taken the extra time to go with bananas because trying to thread the speaker wire into the speaker terminals is tedious, there not much room between the terminals and even me with my skinny fingers struggled a bit. Wish Onkyo designed their terminals side by side, but I think only Denon does that. Anyway, after all the speakers were connected (I'm currently using a 5.1.2 setup) and I connected my tv, Blu-ray player, CD player, etc., etc., I ran the AccuEQ Room Calibration, and I was good to go. I did change the some of the settings like speaker volume that AccuEQ has set but nothing major. I have noticed that I need to turn the volume up much higher on this Onkyo than on my previous one. What I mean by that is that on my previous Onkyo I would set the volume indicator at around 30-35 tops for movies. With this one it's more like 40-45, maybe how the volume is measured is different on this one. The sound is excellent for movies and music I have no complaints there. I have only tried a few of features so far like Airplay but will dig deeper into the manual (I downloaded from the internet) as time goes by. I will say as far as build quality is concerned it's not bad, but IMO my old Onkyo, a 2009 model, had the look and feel of a more expensive receiver. But it's what's inside that matters most so hopefully this one last as long as my previous Onkyo.
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Reviewed in the United States on February 22, 2024
J
Verified Purchase
JOKER
Cuba, US
★★★★★ 1
Sound unexpectantly blasted for no reason. It malfunctioned!
I spent hours between installation and set up! I had to return it. I turned on NET (network) to play Sirius Xm and the volume was low but after a few minutes the sound turned all the way up to maximum completely on its own? This happened at least two more times. I contacted ONKYO and was told it is clearly defective and that their is no solution to correct the problem, and that I should return it immediately! I purchased the newer model and am pleased with its performance! It’s unfortunate because the first one that had the issue with the sound really played nice, but having sound change its volume so suddenly to its full capacity was not what I expected, nor felt comfortable enough to keep as I said I was told to return it, which I did! My advice here would be to purchase the newer model, which seems to be much more stable in its performance, and the quality is excellent.
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Reviewed in the United States on November 29, 2025
B
Verified Purchase
Bossman
Natrona Heights, US
★★★★★ 5
Absolutely Love This Receiver
The Onkyo TX‑NR7100 has completely transformed my home theater. The sound quality is rich, detailed, and powerful, and the 9.2‑channel setup gives movies and music a level of immersion I didn’t realize I was missing. Dirac Live right out of the box is a huge win — the room correction made an immediate, noticeable improvement. Setup was smooth, the interface is clean, and everything from streaming to switching inputs feels fast and reliable. It also plays perfectly with the rest of my system, and the THX certification really shows in how cinematic everything sounds. I absolutely love this receiver. It’s one of those upgrades that makes you wonder why you didn’t do it sooner.
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Reviewed in the United States on February 20, 2026
J
Verified Purchase
James Tepper
Lake Worth, US
★★★★★ 5
Incredible 9.2 Surround receiver at an unbeatable price.
I may return at a future date to give a more complete review, but others that are much more knowledgeable about audio equipment than I have already done so. For me, the Onkyo (Onkyo TX-NR7100 9.2-Channel 8K/4K Network A/V Receiver) replaced a much older (2001) TX DS787 5.1 100 W Surround receiver that listed new for around $1050. I probably didn't pay quite that much but certainly something near $900. It was great for its time, perhaps even advanced with THX, Dolby, and other listening modes. But it didn't have: HDMI inputs or outputs, any BlueTooth capability, no hard wired or WiFi connectivity or basically any operating or connection modes that most all modern receivers have. This turned into a big problem with modern LED/LCD/OLED TVs, Alexa and other now common devices. I bought my new Onkyo TX-NR7100 from Amazon for $625. Other retailers (e.g.Best Buy) advertise it for up to $1200, so Amazon's price is outstanding. Set up was far more complicated (for me) than any previous receiver that I ever owned, mostly because there were a very large number of back panel input and output jacks, to and from the TV, as well as speaker outputs for 9.2 surround. Suffice it to say that once everything was connected properly (I made a few mistakes along the way), I was completely thrilled. The On Screen Display, completely accessible either from the front panel or the remote was far superior to anything I had ever seen before. Literally every operating parameter is accessible to the user. And I used most of them. It is also completely WiFi ready so my 150 Gbit home Wifi network lets it connect wirelessly and stream music error free. BlueTooth is also another way to connect almost any device to it for audio and audio/video playback if you connect the digital connections to and from a modern TV. It also speaks and listens to Alexa, although I must confess that I haven't played around with that much yet. This is already much longer than I had intended, so let it suffice to say that the Onkyo TX-NR7100 is an absolutely incredible receiver for an incredible price. I'd give it 8 stars if I could. JM TEPPER
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Reviewed in the United States on November 7, 2024
B
Verified Purchase
Brian M.
New York, US
★★★★★ 5
Sounds great.
Just received my Onkyo TX-NR 7100, watched a few YouTube videos before it arrived, so set up was easy. Ran accuEQ, I am getting new front speakers so I’ll wait to run Dirac. After accuEQ, I still had to make a few adjustments, to the speaker levels and especially the sub. It set my subwoofer way too low. As of right now having no problems with Bluetooth. I’ve only listened to music so far, can’t wait to watch a movie. For now I have a 5.1.2. System, getting new fronts, the Klipsch r51-m’s will go to the rear surround and Klipsch r41-m’s will be my height speakers in a 5.1.4 system. So far loving this avr. Update 2: Just calibrated with Dirac for the 6th time. They tell you if you sit in a recliner, reclined measure with it reclined. Well I measured with the chair in its upright position. It makes a huge difference I hear the surrounds much better. Btw I listen to all channel stereo, I know audiophiles say it sucks, however I listened to 2 channel stereo for 20 years, when there was nothing else. I didn’t buy a 9 channel avr to listen to 2 channel stereo. Like Randy the cheap audio man says “ audiophiles aren’t always right. If it sounds good to you, that’s all that matters.” So try calibrating in the upright position, or if you sit on a stationary chair or couch, try positioning the mic slightly forward of your listening position. It makes a huge difference. Hope this helps, enjoy. Update: Ok bought Klipsch rp-600m speakers for the front with 52c center. 51m surrounds, 41m rear heights. Polk owm3 front heights. Why Polk? Lighter easy to hang and as height speakers they are only there for atmos. Ran Dirac live, the application does what it would take several hours to make it sound like it does, if I even could get it to sound so good. Apple TV 4K with my Hisense U8K. The google tv interface is ok, but Apple TV is faster and easier. The Onkyo 7100 is a gem, runs pretty warm but I have it out in the open. If you are going to put in a cabinet I suggest a fan. Very happy with the whole system.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 11, 2025

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